I thought the Deluxe Edition would bring to people the whole experience, with all DLCs and stuff, but it seems like they’ve chosen to make additional content separated from the launching editions.
While it could be a good idea on the paper, making this DLC content only escalations and cosmetic items instead of deeper content like Bonus Missions is a risky move that divided most of the fanbase about buying it or not.
I think this DLC could bring interesting elements around the Seven Sins Theme, but at this point it barely makes it appealing enough to justify that kind of price 
I hope that HITMAN III will get a better treatment in the future and being filled with more concrete and interesting content 
For a more detailed response, check this topic: HITMAN 3: Seven Deadly Sins (NEW DLC) - #1157 by PatteDeFruit
Cheers!